Automatically-braked davit



A. P. SCHT.

AUTOMATICALLY BRKED DAVIT. APPLICATION FILED FEB.1.1921.

VPaienfed July 25;, w22.

A... P. SCHAT.

AUTOMATICALLY BRAKE'D DVIT.

APPLICATION HLED FEB. 1.1921.

A-Qyw. Patented July 25,19224 2 sHEEs-SHEET 2.

scrareseawrsnr orifice.,

A 'NE P. SCHAT, OF THE HAGUE, NETHERLANVDS.

AUToMA'rIcALIiY-BRAKED Davis.

T 0 all whom it may concern.'

Be it `known that lr., Ann P. SCHAT, a citi'- zen o'lI Holland, residing at TheHague, kin the Province of Zuid Netherland and Kingdom ot the Netherlands, have invented certain new and useful improvements in Automatically-Braked Davits, ol which the tol,- lowing is a specification.

My invention relates to davitsboth automatic and non-automatic-for swinging lifeboats overboard, and is related to my pending applications #4d-2,032, :li-390,603, :#286,- UiS, and #$353,907.

ln davits of this character serious di'fiiculties are at times encountered by reason of certain conditions which 'frequently obtain at sea. For instance, in times ot disaster, itv

is often desirable to put lilieboats overboard at either or both sides of a ship that has a. heavy list. Now. it the davits be so arranged as to automatically swing the boats out properly when the ship rests on a level keel, then the davits on the upper side o'l the ship will not swing them out' automatically at 'all against a heavy list, while the davits on the ylower side ol the ship will fairly leap overboard with dangerous swiitness and power. It the davits be so arranged that they will put boats over the upper side of the ship' against a heavy list, thatwill make it all the worse tor the davits' at the lower side o'l the ship, to say nothing of the 'fact that, in this lattercase, they will put boats over on both sides entirely too swiftly when the'ship rest-s on a level keel.

One ot the objects ot the present invention is to provide braking mechanism adapted' to lock a davit (whether it be automatic or nonautomatic) under the influence of' the weight o'l the boat or other load suspended therevfrom, the braking mechanism Vbeing preferably automatic in its action.

.-L specifi;- object is to provide a davit having` bralizing means adapted 'to hold it normally ,locked against rotation, and also having means whereby the weight depending irom the davit normally operates to lock the davit or brake it to a stand-still; these two braking means being adapted to either work together or separately, the davit being permitted in either case to rotate by independent mechanism adapted to ease up the braking pressure on the davit sufficiently to permit it to 'rotate with as much freedom or as much restriction as may be desired. y

Another object is' to provide braking Specification of Letterslatent. Patentgd July 25, 1922 Application filed February l, 1921. Serial No; 441,618. I

means which, while adapted to very gently release the davit to permit its outboard movement, will yet promptly engage and stop itat any point desired.

Other objects will appear in the subjoined description. l

The invention consists in certain novel 'Features ot construction and arrangement of parts, as will be hereinafter described and claimed, reference being had to the accompanying drawings, in which-'- Fig. l is a side elevation of one form of my davit with a lifeboat depending theretrom. Fig. Q is a section of Fig. l taken at 'the upper side ot' the brake discB in a. plane parallel with said disc, to show a plan view ofthe braking mechanism located in the "swing outboard by gravity. L The brake disc is rigidly secured to the dav'it preferably adjacent its lower bearing, and is provided with a central peripheral groove 3 having its sides inclined inwardly toward each other to cooperate with the wedge-shaped brake blocks -llocated on dianietrically opposite sides oth the brake dise 3, and adapted to be forced into the groove 3 by means of brake levers 5, which are pivoted at their inner ends to bearings 6 rigidly supported ontlie davit frame 2, and connected at their opposite ends with the toggle '7,

which is in turn pivotally connected at its central joint with the block 8, said block being biturcated at its inner end to receive said joint, and pivotally connected near its other endto the lower end ot a bell-crank lever 9 'formed o' two parallel plates which are adapted. to rock on a pivot l() carried by supports Il rigidly mounted on a channel bar l2 whi ch is in turn supported on the frame 2Q The pivot l0 is held in operative position on the supports kil by means ot small plates il, which are suitably secured in flat engagement with the outer faces of the supports 1l, with their edges Vextending into the transverse grooves lOa in the slightly projecting ends ot said pivot.

The upper end of thebell-crank lever 9 is engaged by the lower end of a cable or load rope 13, while the upper block 14 of the tackle, instead oli' being yconnected to the davit head in the usual manner is suspended from the other end of said loa'd rope or cable 13 which is led up from said block over the sheave 15 iatthe-upperend of the davit, and

down over the. sheave 16 'atthe bendnthelreot,`

and on to the bell-cranklever.

The boat-:tall runs romthe upper tackle block 141 over asheave-17 on the same shaft with the she-ave 16, said shaft being carried by a strap 18 adjustably secured around the davit. The boatfall maybe led downwardly from the sheave 17 and be laid on the cleat 20 in the usual manner. j

The block 8 which at its bifurcated end has pivotal connection with the toggle 7, has, at

its other end, swivel connection with the screw spindle 21, which is provided with a screw thread of great pitch, and is received in an elongated brass nut 22 suitably secured to the frame 2. This nut is internally threaded to correspond te the threads onthe spindle, said. cooperating threads on the spindle and nut being et so great a pitch that only slight end pressure on the spindle 21 will be required to cause the same to rotate in the nut, which arrangement not only causes the spindle`21 to be non-selibraking in the nut 22, but also causes aslight rotation of said spindle 21 to impart to the same a comparatively great longitudinal movement, wherebyv when thelever 23 is rotated forwardly only slightly, a sulncient longitudinal movement will be imparted to the spindle l21 to promptly apply the brakes, whereas on the other hand. when the lever 23 is released the come disengaged 'from the groove 3 oi'fthe bra ke disc at approximately the same time when the levers 5 are movedr in a direction toA unloclii the brake. lP rom the Yforegoing it will be seen that the entire weight of they load is suspended Ytrom the cable 13 and utiliZed to apply the brake to the davit, always Adavit to a standstill.. and when the boat is inproportion to the weight ot thev load.`

whether the boat be empty or iully loaded; the adjustments oil the parts being such that the weight ol the empty boat. brakes the loaded` it will be additionally braked in proportion to the added weight, so that the i davit always remainsnormally locked when the boat is depending therefrom, and tan only rotate when the brakingpower of the rlmrd"is,itol a `greater or less degree, counter- 'ver the davit is permitted to swing out as gradually as may be desired, and when the handlever is released the davit is again instantly lockedagainst rotation, since as already referred to the pitch oi the threads on the screw stem 21 is so great thatsaid stem is easily rotated when pressed longitudinally outward bythe weight of the load lthrough the bell-crank lever 9, and therefore said threaded stem does not citer yany appreciable resistance to the prompt automatic operation of thebrake, as itl would do it. its threads were of much less pitch. j

F rom the foregoing, it will be seen that however strong the winds, or however badly the ship may be rolling and pitching, or-

davit will always be firmly held against ro tation, until permitted to rotate by a proper turn ot the hand lever 28.

But -witl'imy` device as thus far described,

the brake would be released when the boat'V ing a constant load on the bell-crank lever The bell-crank lever is provided with a "downwardlyextending portion 26 adapted at its llower end to be engaged by a tension spring 27, said spring being threaded at its other end27fL which extends out through plate 2S of the trame, and is provided with j amb nuts 29 for regulating the tension ot Vsaid `spring to cause the same to apply the braking mechanism independently ol the load, so that the davit will always be braked against swinging back `and forth,

even when the boat is no longer supported thereupon, but `is resting on Athe water or` on `the checks.

This spring may be made suflciently strong if desired, to take` the place oll the load'and load rope 13 in applying the brak ing mechanism, in which case the load rope arrangement may be dispensed with, and the boat suspended from the davit in the usual manner. lith this arrangement it is only necessary to adjust the spring 27 to hold the davit braked to a stand-still when the boat is fully loaded. The boat can then be low` fered :by the hand lever just as when the .weight of the load is utilized to operatethe brakes. y j j 4 In' order to shield` the brake-applying spring from thecorroding action of salt air and salt water, the same may, il desired. be

" enclosed in a metallic box 30, as illustrated `however'adverse other conditions may be, the

mames in Fig. 8, in which the box is shown provided with Jtianges 3l `tor rigidly securing the same to the shi-ps deck, and hasI a cover 32. `Extending longitudinally of the box is a rod 33 having a reduced inner end 34 extending through a supporting standard 35. The rod 33 carries a compression spring 36, and extends out through the end ofthe box, and by means'oil a link37 is pivotallyconnected with the downward extension 26 of the bell-crank lever 9 or' the braking mechanism. At its inner end, adjacent the reduced portion 34, the rod 33 is threaded `to receive the jam-nuts A38 for regulating the tension on the spring 36.

The standard 35 is provided with a base 39, for removably securing said standard to the box 30. f

The rod 33 and the link 3, as well as many other parts of the device, are preferably made of bronze or other metal which oifers unusual resistance to the corrosive action oit salt air and salt water.

The box 30 is provided with a packing box 40 for the projecting end of the rod 33, whereby the outer air is entirely excluded from the spring and no salt water can possibly reach it. Moreover, the box may be filled with oil, if desired.

lt has already been pointed out that either the load alone or the spring alone may be made to operate the braking mechanism to lock the davit against rotation, and that in either ease the braking pressure may be regulated by the hand lever 23 to permit the davit to revolve. And it is also apparent that if need arises the lever 23 may also be used to apply the brakes with greatvforceeither independently of, or in conjunction with, the other brake-operating mechanism. it therefore only remains to be added that the parts may be-so adjustedthat neither the load alone, nor the spring alone, will lok the davit, but that 'the combined action of both will be required to brake it in the manner desired. In that oase, regulating one of the parts, as for instance the spring will regulate the torce of the entire braking mechanism oit the davit.

rThe operation of the device is very simple: Ii the weight of the load be depended upon ohieiiy to` brake the davit, it will be seen that as soon as the boat is released from the chocks and depends from the load rope i3, the bell-crank lever is moved in a direction to apply the brakes so that the davit cannot rotate. A proper movement of the hand lever Q3 counteracts the braking .torce of ythe load on the bell-crank lever and permits the davit to rotate. rlhe moment the lever 23 is released, the brakes are again applied wi'th the full braking power of the load. When the boat has been lowered and rests upon the water,'the spring 27 operat- Ving through` the bellcrank lever 9 still applies the brakes with sufficient force to keep the davit from oscillating.

li' the boat be suspended from the davit in the ordinary manner, and the spring 27 be employed alone i-'or braking the davit, the spring should be made strong enough to apply the brakeswith suiiicient force to hold the davit against rotation when supporting its maximum load, leaving the device still dependent as before, upon the easing up of the braking force by the hand lever 23, in order to permit the boat to swing out.

While the drawings show a davit inclined towardthe sides of the ship to cause it to swing outboard by gravity, attention is called to the fact that my invention is equally applicable to davits which are not within themselves automatic, but are adapted to be swung out by the weight of the load alone, as, for instance, in my c-opending application #$89,445. l

n ln Fig. 4 I have shown a slight modification of the construction illustrated in Fig. 3, whereby the link 37 andthe packing box 40 may be dispensed with.

In this modification l have provided the rod 33 with a collar or sleeve 4l having a central longitudinal bore snugly fitting said rod, said sleeve being also provided with a comparatively broad, flat head 4Q against the inner face of which the end or' the spring 36 abuts to hold the outer faceoi said head in close engagement with the end of the box 30 around the opening 30 therein through which the rod 32 projects. The lower end of the extension 26 of the bellcrank lever is provided with a slot 43 which engages the pin 44 in the outer bifurcated end of the rod 38, and permits said extension 26 to rock on its pivot 45 without imposing lateral strain upon the projecting end ot said rod 33.

The pin 44 may be provided with a triction roller if desired.

With the above arrangement the box 3() will have aproximately the same air pressure inside of it as outside of it, and will be practically air tight, because there will always be a film oi oil surrounding` the rod 33 between the same and the inside of the sleeve 41, and between the head 42 of the collar and the end of the box 30 around the opening 30a; and this `film of oil will form a liquid packing, as it were, that will prevent the entrance of air or salt water int@ the box.

In order to insure a supply of oil always `,being on the rod 33 adjacent the inner end of the sleeve 41, I have provided at that point a lubricating wick 46, preferably of fibrous material, which is tied around the rod and extends down and rests on the bottom of the box, `so that as long as there is .any oil at all in the box, the rod 33 will be lubricated.

mechanism to the davit in proportion to the While my braking 'mechanismhas exceptional value for automatic davits, it is not limitedto davits of thisclass, nor does it require in any case'that guy ropes shall 'be `fitted to the davit heads.

Having now described my invention and shown one particular embodiment of the same, what I`claim as 'new and desire to protect by Letters Patent is:--`

l. In a device or the character d cribed, a davit` adapted to rotate outboard andinboard; and means for utilizing,` `the VWeight of the load to brake the davit.

2. In a device of the character described, a davit adapted to rotate outboard and inboard; means for utilizing the Weight of the load tobra-ke the davit against rotation; and independent means for controlling the braking mechanism of the davit.

3. 'In a device of the character described, a davit adapted to rotate outboard and inboard; braking` means for normally locking' the davit against rotation; and independent means for controlling said braking: means.

el. Inv a device of the character described, a davit adapted to rotate outboard and inboard; and means 'for utilizingthe Weight of the load to brake the davit against rotation, in combination with additional means :for normally brakingy the davit'against rotation; and independent means for `controlling 'the' braking` mechanism of the `davit.

5. In a device of the character described, a davit having ci-'cooperating` tackle; braking mechanism for vthe davit; a i'iexible member connected with the braking mechanism to operate the same and extending from thence over the top of the davit with the upper block of the tackle suspended therefrom; whereby to apply said braking' weight oft' the load suspended Jfrom thel tackle; andl independent means for` controlling` said braking mechanism.

G. In a device ot the character described. a davit adapted to swing outboard under Athe inluence of its load ,means Jfor utilizing the Weight of the load to brake the davit against rotation; and independent means for controlling` the brakingmechanism of the davit.

T. In a device ot the character described, a darit adapted to swingoutboard by gravity; braking` means tor normallylocking; the davit against rotation: and independent means for controlling said' braking means.

S. In a device of the character described, a davit adapted to swingoutboard under the ,influence of its load; and means for utilizing' the weight of the load to brake the davit against rotation, Vin combination with additional means for normallybraking the davit; and independent means for control- .ling the braking `mechanism ofthe davit.

9.'Ina device or ithedcharacter described, a davit adapted to rotate outboard by gravbraking' means. 'i

ity; and braking means adapted to nor` mally lock the davit against rotation, in combination with additional means i'or utilizingt-he Weight oit the load to brake the davit against rotation; and independent means 'for-controlling the braking mechanism'ot the davit.

l0. In device o'tf the character described, a davit adapted to rotate outboard under theinfl-uence of itsload; brakingmeans 'for normally locking-` the davit against rotation; and independent means" 'for controlling said 1l. In a device of the character described, a davit adapted to swing outboard under the influence ot its load; braking mechanism toi-the davit; a-'l'lexiblemember connected at one end to the load and arranged to hold the same suspended tromthe davit, and secured at its other end to the operating mechanism of the brake, 'whereby the braking mechanism is applied to the davit in proportion to the weight of the loadyand manually operated means tor rep;ulatingv saidy brakingl mechanism.

ll2. In a device of the character described, davitadapted to swing` outboard under the influence of' its load; braking mechanism -for the davit; a flexible member adapted at one "end to hold the load suspended from the davitpand operatively connected'at its other `end tothe brake operating mechanism,

wherebyl toapply the brakes to `the davit in proportion to the Weight Vof the load; a loaded lever cooperating with-said brake operating-'mechanism to additionallj,v applythe brakes tothe davit; `and manually operated means 'for cont-rolling-` the braking` `mecha nism of the davit. y

13. In a device of the character described,

^ a davit adapted to swing outboard under the I inuence'of its load; braking mechanism `for ie davit-includ'lng a bellcrank lever 'for applying the brakes; av flexible memberadapted `at one endfto support the load suspended lfrom the `davit, and operatively. connected at its other end to said bellcrank lever, :whereby -to apply 'the brakes in proportiont `to the Weight ot the load; andy manually operated means-also engaging-said bellcrank lever for regulatingl the power of theload thereupon.

14; In a device of -the character described,

a davit adapted to swing' outboard under the influence of its load; braking` mechanismy `for the'davit including a bellcrank lever for `ap-` plying the brakesga 'iiexible member adapted at o neend to support 'the load suspended "troml the 'davit, and'operatively `connected at its other lend to said bellcrank :'lever, whereby tovapply the brakes to the davit in proportion to theyveight ot the load; aloaded leveralso conncctedwvith said' bellcrank lever to additionally apply the brakes. tothe davit; and manually operated .meansiffor counteracting the rinfluence VofV thewload i and:

ofthe loaded lever upon the braking mechanlsm.

15. In a device of the character described, a davit adapted to swing outboard under the influence of its load; braking mechanism for the davit; a spring operatively connected with the braking` mechanism and arranged to normally apply the brakes; a housing for said spring; a shaft received in said housing With the spring received around the shaft, the housing having an opening With the end of the shaft projecting out therethrough for engagement with the braking mechanism; and a sleeve on the enclosed part of said shaft, the spring being arranged to press the end of the sleeve against the housing around the opening therein through which the shaft projects.

16. In a device of the character described, a davit adapted to swing outboard under the influence of its load; braking mechanism for the davit; a spring operatively connected with the brakingmechanism and arranged to normally apply the brakes; a closed housing for said spring said housing having approximately the same air pressure inside of it as outside of it; a shaft in said housing with the spring received around the shaft; the housing having an opening with the end of the shaft projecting out therethrough for engagement With the braking mechanism; a sleeve on the enclosed part of said shaft, the spring being arranged to press the end of the sleeve against the housing around the opening therein through which the shaft projects; said housing being adapted to hold a liquid packing for sealing the housing around vthe opening therein; and means for conducting said packing from'the bottom of the housing to the exposed surface of the shaft. s

17; In a device of the character described, a davit adapted to swing lifeboats outboard and inboard; braking mechanism fori the davit including'a spring; a housing for said spring; a shaft received in said housing Wit-h the sprin and adapted to `cooperate therewith in t e operation ofy the braking mechanism; said housing havin an opening with the end of the yshaft projecting out therethrough for engagement vWith the other parts of the brakingmechanism; and a wick engaging said shaft adjacent the opening therein and extending down to the bottom of the housing.

18. In a device of the character described, a davit adaptedto rotate under the influence of its load ;fbraking' mechanism for the davit tol resist its tendency to rotate, said mechanism comprising a disc secured to the davit; brake levers on opposite sides of the disc, said levers being pivoted at their shorter ends to fixed bearings and connected at their longer ends by a toggle; braking means con- .eeted. with the tegel@ fer' normally applying the brakes; and independent means for controlling said brake applying means.

19. In a device of the character described, a davit adapted to rotate under the influence of its load; braking mechanism for the davit to resist its tendency to rotate, said mechanism comprising a disc secured to the davit; brake levers on opposite sides of the disc; said levers being pivoted at their shorter ends to lixed bearings and connected at their longer ends by a toggle; means connected with the toggle for automatically operating the brakes; and manual means for controlling said automatic brake applying means.

20. In a device of the character described, a davit adapted to rotate under the iniiuence of its load; raking mechanism for the davit to resist its tendency to rotate, said mechanism comprising a disc secured to the davit; brake levers on opposite sides of the disc, said levers being pivoted at their shorter ends toy fixed bearings and connected at their longer ends by a toggle; means connected with the toggle for utilizing the Weight of the boat to apply the brakes; and manual means for controlling said brake applying means. v

21. In a device of the character described, a davit adapted to rotate under the influence of its load; braking mechanism for the davit to resist its tendency to rotate, said mechanism comprising a disc secured to the davit; brake levers on opposite sides of the disc, said levers being pivoted at their shorter ends to fixed bearings and connected at their longer ends by a toggle; means connected with the toggle for normally applying the brakes; additional means for utilizing the weight of the load to apply the brakes in proportion to said Weight; and manual means for independently controlling said brake applying means.

22. In a device of the character described, a davit for supporting a lifeboat and adapted, when the boat is freely suspended thereupon, to swing outboard with the boat automatically; braking mechanism for the davit to resist its tendency to rotate, said mechanism comprising a disc secured to the davit and provided on its periphery With a V- shaped annular groove; braking levers on opposite sides of the disc pivoted at their shorter ends to fixed bearings and pivotally connected at their longer ends by a toggle; brake blocks pivotally supported by said brake levers, and having their braking faces formed V-shaped and adapted to be received into the V-shaped groove of the brake disc; means for l automatically operating the toggle to apply the brake shoes in said groove; and manual means for independently controlling said brake applying means.

23. In a device of the character described, a davit for supporting a lifeboat, and adapted, when the boat is freely suspended there- 130 upon, to swing outboard with the boat automatically; braking mechanism for the davit to resist its tendency to rotate, said mechanism comprising a disc secured to the davit and. provided on its periphery with a V- shaped annular groove; brake levers on opposite sides of the disc pivoted their shorter ends to fixed bearings and pivotally connected at their longer ends by a toggle; brake blocks pivotally supported by said brake levers, and having their braking 'faces formed V -shaped and adapted to be received into the V-shaped groove ot' the brake disc; means ilor autonnitically operating the toggle to apply the brake shoes in said? groove; and positive means ifor simultaneol'isly disengaging the brake blocks Ytrom the "J -shaped groove of the brake disc when the brake levers are released.

24. In a device oli the characterdescribed, a davit for supporting a lifeboat, and adfapted, when the boat is :treely suspended' thereupon, to swing outboard with the boat automatically; braking means for the davit to resist its tendeucyto rotate, said meanscomprising a disc secured to the davit. and provided on its periphery with a V-shaped annular groove; brake levers on opposite sides ol the disc pivoted at their shorter ends to fixed bearings and pifvotally connected at their longer ends by a toggle; brake blocks pivotally supported by said brake levers, and having their braking faces formed V -shaped and adapted to be received into the V-shaped groove of the 'brake disc; means ttor automatically operating the toggle to apply the brake shoes in said groove; and yielding means for sinniltaneously 'forcing` the brake blocks each outwardly in a direction from the centre of the brake disc when the brake levers are released.

25. In a device of the character described, a davit for supporting a lifeboat, and adapted, when the boat is freely suspended thereupon to swing outboard with the boat automatically; braking means for the davit to resist its tendency to rotate, said means comprising a disc secured to the davit, and provided on its periphery with a V-sh'aped annular groove; brake levers on opposite sides of the disc pivoted at their shorter ends to fixed bearings and pivotally connected at their longer ends by a toggle; brakeL blocks pivotally supported by said brake levers, and havingtheir brakiim` faces formed V- shaped and adapted to be received. into the V-shaped groove of the brake disc; means for automatically operating the toggle to apply the brake shoes in said groove: and spring plates xedly secured at one end and adjustably connected at their Free ends with the brakeshoes and adapted to yieldingly `resist the inward movement o'l" said brake shoes, whereby said shoes are simultaneously moved automatically outwardlin a" lrection trom the centre' of the disc when the brake levers are released.

26. In a device of the character described, a davit adapted to rotate under the influence of its load; braking mechanism for the davit to resist its tendency to rotate, said mechanism comprising a disc secured to the davit; brake levers on opposite sides oil? the disc, saidv levers being pivoted at their shorter ends to fixed bearings and connected at their longer ends by a toggle; a bell-crank lever connected with the toggle and with the load and adapted: to be operated by the load to apply the brakes; andv manual means, invinding a brakeI pin having ai non-self-braking thread, for controlling said bell-crank lever to counteract the braking` force imposed thereupon by the weight oli the load.

27. InA a device of the character described, the combination with a crane and a cooperating tackle, of means li'or supporting the upper block of' the tackle at a variable distance 'from the top` of the crane; and means for utilizing the movement of said upper tackle block toward andv 'trom the top of the cranek tooperate mechanism connected with the crane.v p i 28. InV devices of the character described, the combination Witlr a davit and its c0- operating tackle, of alexible member adapted to support the upper block of the tackle suspended :trom the davittop and securedA to a movable member adapted to` be actuated `by the tension ot said flexible member.

29. In a'device of the character described, the combination with a davit and a cooperating tackle having an operating `falileX- tending therefrom 'toraise and lovverthe lower tackleblock, of an independent member adapted to engage and support the upper block ofthe tackle at a variable distance from the vdavit top; i and means for utilizing the movement o' said Aupper tackle block towardand lfromtheftop'of the davit to: operate mechanism connected with the davit. 4 f

30'. In a device of the character described, the combination with a vcrane and a cooperatA ing tackle, of a tlexiblemember adapted -to support the upper tackle block suspended from the crane; power operatedmechanism adjacent the' crane, said llexible member being operatively connected therewith.

31. In a device of the characters described, a davit having a cooperating tackle; braking mechanism for the davit; a-leXilble `member operatively connected with the kbraking mechanism and extending over the-top of the' davit with the upper block of the tackle Suspended therefrom, whereby to utilize the 'weight supported by the tackle, to

` operate the davit brake.

32. In a device of the character described, a davit having' braking mechanism; `means ,forngjrmany applying said mechanism to the davit; a flexible member connected with said braking mechanism. and adapted to also apply the same to the davit, and extending over the top of the davit with the upper tackle block suspended therefrom7 wherebyr to use the Weight of the load to cooperate with said normal braking means to apply the braking mechanism to the davit; and independent means for controlling said braking mechanism.

In a device olf the character described, a davit adapted to rotate on its longitudinal axis and inclined outwardly toward the water to adapt it to rotate outboard by gravity; means for utilizing the Weight of' the load to brake the davit against rotation; and additional means for regulating said braking means and for controlling the same independently of the Weight of the load.

34. In a device of the character described, the combination with a davit adapted to rotate inboard and outboard on its longi-k tudinal axis, of means for braking the rotation of the davit, said means including a plurality of braking members adapted to move simultaneously into braking or releasing position.

35. In a device ot the character described, the combination with a davit adapted to roa brake disc rotatable with the davit; and n approximately parallel brake levers on diametrically opposite sides of. the disc adapted to be moved in substantially parallel relation toward and from the centre o'l the disc to apply and release the brakes.

36. In a device of the character described the combination with a davit adapted to rotate inboard and outboard on its longitudinal axis, of braking means comprising a brake disc rotatable with the davit; brake shoes on diametrically opposite sides of the disc; brake levers for supporting said shoes, said levers being on opposite sides oi'i the disc and disposed approximately parallel with each other and having one end pivotally ymounted and the other end hinged to rods nearly in alinement with each other When the shoes are in position to engage the brake disc; and a member pivotally `connected with said rods for actuating the brakes.

In testimony whereof I aix my signature.

ANE I. SCHAT. 

